Have c100 decided to try C5. The C5 has a smaller footprint and a nice magnetic remote. The seat though is definitely smaller than the c100 like the opening is smaller. It’s a high quality bidet at a high quality price but vs other brands of bidets it’s much more substantial. I recommend Toto brand this one is nice if you need wireless remote or a better looking bidet. But the c100 provides the same experience at a much cheaper price. The e water I don’t tell much of a difference vs the normal premist of the c100.